140=7(6+a)

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Solution for 140=7(6+a) equation: 



140=7(6+a)

We move all terms to the left:

140-(7(6+a))=0

We add all the numbers together, and all the variables

-(7(a+6))+140=0



We calculate terms in parentheses: -(7(a+6)), so:

7(a+6)

We multiply parentheses

7a+42

Back to the equation:

-(7a+42)



We get rid of parentheses

-7a-42+140=0

We add all the numbers together, and all the variables

-7a+98=0

We move all terms containing a to the left, all other terms to the right

-7a=-98

a=-98/-7

a=+14

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